I guess what I meant is something more serious than what most people have been exposed to. I didn't mean to imply that Zeilberger takes the same approach as oth

I guess what I meant is something more serious than what most people have been exposed to. I didn't mean to imply that Zeilberger takes the same approach as other working mathematicians. I agree though that his work tends to be more accessible. Another very accessible paper by one of the co-authors here, Herbert Wilf, is worth mentioning: http://www.math.clemson.edu/~calkin/Papers/calkin_wilf_recounting_rationals.pdf http://www.math.clemson.edu/~calkin/Papers/calkin_wilf_recou...